( 3«^4 ) 
'An Account of fome Beo\f. 
I. ELEMENS de GEOMETl^IEi parts P. IgQzcc 
Gafton Pardies, dela Comp. del. A Paris 1 671, to 12**. 
T He Learned Author of this^Tradt declarcth, that in it 
he hath given a fliort and eafy Method to learn what r% 
neceflTary to be known of Euclid^ Archimedes, A polUniuj^znd of 
the beft Inveniions of the Ancient and Modern Geometri- 
cians. Of which Method he hath now publifli't the firft 
9 Books 5 referving to another time the remaining Seven ^ 
which, be faith^ are to explain the more profound and fub- 
lime inventions of this Science, but are not fo neceffary to 
thofe, that have a mind to be^in the Study of it; for whofe 
greater conveniency he feems to have taken the pains to 
^ divulge this firft part , In which he createth of what he 
thought moft confiderablc in the 15800^5 of Euclid:, and 
bcfidcs, What Arehimedes hath demonftrated of the Qua- 
drature of the Circle, as alfo the Doiftrine of Logarithms, 
of Smis\ &c. He (hews the admirable proprieties of the 
Numbers, which Euclid hath demonftrated in the 7,8, and ^tb. 
of his Elements^ He sfBrras ^ to have found a new way of 
Teaching the Docflrine of IncoTr^menfurnbles^ and given Di- 
rections in four or five fmall pages 5 perfcftly to comprehend 
what very few perfons , even of thofc that meddle with 
Geometry, are able to underftand. 
Befides this, he treateth of divers kinds of Progrejfionr y 
chiefly infifting on the Two moft famous ones , vii{. the Ceo- 
metrual and Arithmetical 5 and comparing them one with 
another, he treateth of Leganthms ^ and fhews the Art of 
them by the means 0( a Ceometrick Line, by himefteem*d 
very ufcful for the Refokition of all forts of Algebraical 
Problems; by the help of which he faith to have formerly 
fquared the HyperbBla. 
He concludcth this firfi Part with a Ihort Pra3ical Geo* 
merry 3 wherein, befides the more eafy and more common 
,Operati®ns 
